This document discusses prenatal and postnatal growth and development of the mandible. It describes the three phases of prenatal life and outlines the formation and development of structures like the pharyngeal arches, meckel's cartilage, and bones in the mandible through intramembranous and endochondral ossification. It also discusses changes that occur in mandibular growth patterns after birth through childhood and adolescence, including growth at specific sites like the condyle, ramus, and alveolar process.